Here's TMI: When I MB, I MAKE it take at least 45 mins to an hour. I'm not in a hurry to get it over with. Getting there feels too good. I guess I could climax in a shorter time, but who wants to?
The time issue can make both parties VERY self-conscious. The best lover I ever had didn't care how long it took, and that was a blessing. He loved the process of getting there. One time we actually "did it" continuously in the starfish position for two and a half hours before we decided to o. Sublime. OTOH, my bf has complained about his hand getting tired and cramped if it takes more than 15 minutes.